Fluidized bed air gasification of solid recovered fuel and woody biomass: Influence of experimental conditions on product gas and pollutant release

Valin, Sylvie; Ravel, S.; Vincent, Philippe Pons de; Thiéry, Sébastien; Miller, Hélène

doi:10.1016/j.fuel.2019.01.094

Cited by 29 publications

(23 citation statements)

References 16 publications

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“…The achieved CCE in Run#3 was 88.1%, which is in the range of the reported CCE values (generally between 80-92%) for waste gasification in autothermal fluidized beds operating up to 800 • C [49]. The CGE was 104.5%, which was much greater than the reported CGE values for SRF gasification in autothermal fluidized bed gasifiers that vary between 70% and 85% at best [6,50,51]. The CGE higher than 1 confirms that solar energy was effectively stored in the gas products, and this demonstrates the interest and benefits of solar heating for gasification when compared with autothermal operation (involving partial feedstock combustion).…”

Section: Solid Recovered Fuels Gasificationmentioning

confidence: 54%

“…The SFE represents the ratio between the calorific value of produced syngas over the total thermal energy that enters the reactor, including both solar and injected feedstock energy. n n (6) . m .…”

Section: Beechwood Gasificationmentioning

confidence: 99%

“…While Luleå University of Technology has mainly focused on black liquor gasification [3], Chalmer University of Technology [4] and Vienna University of Technology [5] operated dual fluidized bed reactors at temperatures below 950 • C for various carbonaceous loads and bed materials. Recent work has proposed an updated review about gasification in fluidized beds and compared solid recovered fuels and woody biomass gasification highlighting the gasification improvement with increasing temperature [6].…”

Section: Introductionmentioning

confidence: 99%

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Solar-hybrid Thermochemical Gasification of Wood Particles and Solid Recovered Fuel in a Continuously-Fed Prototype Reactor

2020

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Solar thermochemical gasification is a promising solution for the clean production of low-emission synthetic fuels. It offers the possibility to upgrade various biomasses and waste feedstocks and further provides an efficient way to sustainably store solar energy into high-value and energy-intensive chemical fuels. In this work, a novel continuously-fed solar steam gasifier was studied using beechwood and solid recovered fuels (SRF) particles. Solar-only and hybrid solar/autothermal gasification experiments were performed at high temperatures to assess the performance of the reactor and its flexibility in converting various types of feedstocks. The hybrid operation was considered to increase the solar reactor temperature when the solar power input is not sufficient thanks to partial feedstock oxy-combustion. The hybrid solar process is thus a sustainable alternative option outperforming the conventional gasification processes for syngas production. Wood and waste particles solar conversion was successfully achieved, yielding high-quality syngas and suitable reactor performance, with Cold Gas Efficiencies (CGE) up to 1.04 and 1.13 respectively during the allothermal operation. The hybrid process allowed operating with a lower solar power input, but the H2 and CO yields noticeably declined. SRF gasification experiments suffered furthermore from ash melting/agglomeration issues and injection instabilities that undermined the continuity of the process. This study demonstrated the solar reactor flexibility in converting both biomass and waste feedstocks into syngas performed in continuous feeding operation. The experimental outcomes showed the feasibility of operating the reactor in both allothermal (solar-only) and hybrid allothermal/autothermal (combined solar and oxy-combustion heating) for continuous syngas production with high yields and energy conversion efficiencies.

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Section: Solid Recovered Fuels Gasificationmentioning

confidence: 54%

Section: Beechwood Gasificationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Solar-hybrid Thermochemical Gasification of Wood Particles and Solid Recovered Fuel in a Continuously-Fed Prototype Reactor

2020

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“…Typical feedstocks include biomass, RDF, low-rank coals, lignite, plastics and solid-recovered fuels (SRFs), with particle sizes below 6 mm (Arena et al, 2011;Arena and Di Gregorio, 2016;Hu et al, 2012;Ud et al, 2016). Valin et al (2019) have compared the results obtained from the air gasification of woody biomass (namely beech sawdust and waste wood) and solid-recovered fuel using a bubbling fluidised bed at 1.5 bar. The experiments were carried out while varying the addition of steam, ER ratio (between 0.00 (pyrolysis conditions) and 0.34) and the temperature (between 800 and 900 °C).…”

Section: Bubbling Fluidised Bed Reactormentioning

confidence: 99%

Fluidised Bed Reactors for the Thermochemical Conversion of Biomass and Waste

Iannello

Morrin

Materazzi

2020

KONA

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The growing population and economic development globally has led to increasing resource consumption and waste generation. This has generated concern at local, national and international levels on environmental issues including air quality, resource scarcity, waste management (including plastics) and global warming. The resulting antipathy towards fossil fuels and waste landfilling has spurred the demand for alternative bioenergy and biofuels production methods, making use of abundant biomass and waste feedstock. Although not new concepts, there has been renewed impetus recently to develop advanced thermochemical processes such as pyrolysis and gasification to treat biomass and municipal solid waste (including refuse-derived fuel therefrom). This is because these processes have the potential to add value to cheap and abundant materials by converting them into advanced biofuels and chemicals. The work presented in this paper is concerned principally with the technical analysis and review of new-generation, state-of-the-art systems based on fluidised bed reactors operated with biomass and solid waste. A comprehensive assessment of fluidised bed reactor types and operations is considered, with particular attention given to those processes aimed at the production of clean syngas for the subsequent synthesis of high-value products, including bio-hydrogen, synthetic natural gas (SNG), and liquid fuels.

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“…There are plenty of literature studies that investigated the thermochemical conversion of renewable fuels [7][8][9][10][11][12][13][14][15]. However, only a few of them addressed their fluid dynamical context.…”

Section: Srf Bark Sunflower Shell Wheat Straw Lignitementioning

confidence: 99%

Experimental Study of Entrainment and Mixing of Renewable Active Particles in Fluidized Beds

2020

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Fluidized bed combustors were initially designed and built basically for the utilization of fossil fuels, mostly coal. The actual worldwide trend of transitioning from fossil fuels to renewables requires sufficient knowledge on the fluid mechanics of these new particle types because of the significant differences in their shapes, sizes, densities, and homogeneities. This article presents experimental results on the particle entrainment and mixing of some industrially relevant fuels such as solid refused fuel/refuse derived fuel (SRF/RDF), bark, sunflower shell, and wheat shell. The measurements were performed on a lab-scale fluidized bed experimental facility. The results show that sunflower shell is entrained in the highest degree; however, at very low velocity, the entrainment of wheat shell is the most intensive. The entrainment behaviors of the investigated SRF and bark samples are similar. On the other hand, the mixing results showed that the SRF has relatively high mass fractions in the bottom and centeral regions of the fluidized bed at low superficial velocities, while at elevated velocities, the entire mass of this fuel is shifted upwards. Interestingly, just the opposite tendency can be observed in cases of all other investigated biomass fuels. Finally, the nonspherical renewable active particles have markedly higher concentrations in the bottom region of the bed compared to spherical ones.

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Fluidized bed air gasification of solid recovered fuel and woody biomass: Influence of experimental conditions on product gas and pollutant release

Cited by 29 publications

References 16 publications

Solar-hybrid Thermochemical Gasification of Wood Particles and Solid Recovered Fuel in a Continuously-Fed Prototype Reactor

Solar-hybrid Thermochemical Gasification of Wood Particles and Solid Recovered Fuel in a Continuously-Fed Prototype Reactor

Fluidised Bed Reactors for the Thermochemical Conversion of Biomass and Waste

Experimental Study of Entrainment and Mixing of Renewable Active Particles in Fluidized Beds

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